Table 1.

Yield of A1-preparations from human intervertebral disc

Age	Site	Tissue (g)	A1 mg/g tissue	NP:AF
F	NP/AF	0.38	24.4
F	NP/AF	0.34	39.7
24	NP	1.74	98.0	1.9
	AF	1.92	52.4
27	NP	1.83	70.5	1.5
	AF	1.82	48.1
56	NP	1.65	54.6	1.2
	AF	1.80	44.1
56	NP	1.80	35.7	1.2
	AF	1.83	28.6
76	NP	1.51	16.8	0.9
	AF	1.81	18.4
87	NP	1.70	18.1	0.7
	AF	1.71	26.8

A1 proteoglycan aggregate preparation, AF annulus fibrous, F fetal, NP nucleus pulposus